[formatter] bugs & fixes

[damirka]

Description

• dot_expression now supports trailing comment in a list
• a single element of an arg_list can have trailing line comment
• a single element of an arg_list can have leading line comment
• trailing comment no longer breaks vector_expression

if_expression:

• indentation fixed in certain places
• if-else chain is a special behavior

Test plan

Features tests for all the cases.

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Release notes

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• Protocol:
• Nodes (Validators and Full nodes):
• gRPC:
• JSON-RPC:
• GraphQL:
• CLI:
• Rust SDK:

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